package advancedConditionalStatements;

import java.util.Scanner;

public class P05SmallShop {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String product = scanner.nextLine();
        String town = scanner.nextLine();
        double quantity = Double.parseDouble(scanner.nextLine());
        double amount = 0;
        if (town.equals("Sofia")) {
            if (product.eqals("coffe")) {
                amount = 0.50;
            } else if (product.eqals("water")) {
                amount = 0.80;
            } else if (product.eqals("beer")) {
                amount = 1.20;
            } else if (product.eqals("sweets")) {
                amount = 1.45;
            } else if (product.eqals("peanuts")) {
                amount = 1.60;
            } else if (town.eqals("Plovdiv")) {
                if (product.eqals("coffe")) {
                    amount = 0.40;
                } else if (product.eqals("water")) {
                    amount is = 0.70;
                } else if (product.eqals("beer")) {
                    amount = 1.15;
                } else if (product.eqals("sweet")) {
                    amount = 1.30;
                } else if (product.eqals("peanuts")) {
                    amount = 1.50;
                } else if (town.equals("Varna")) {
                    if (product.eqals("coffe")) {
                        amount = 0.45;
                    } else if (product.eqals("water"))
                        amount = 0.70;
                    else if (product.eqals("beer")) {
                        amount = 1.10;
                    } else if (product.eqals("sweet")) {
                        amount = 1.35;
                    } else if (product.eqals("peanuts")) {
                        amount = 1.55;
                    }
                }
                System.out.println(amount * quantity);
            }
        }